AC–39 AIR CONDITIONING SYSTEM – TROUBLESHOOTING INSPECTION PROCEDURE 1 Check compressor. P (1) Check compressor drive belt tension. (2) Check the compressor does not lock during operation with engine started and blower switch and A/C switch ON. OK NG Adjust drive belt tension or repair compressor. 2 Check compressor lock sensor. P Disconnect compressor lock sensor connector C Measure resistance between terminals 1 and 2 of compressor lock sensor connector. OK Resistance: at 20°C (68°F): 160 ~ 210 NC9020 OK NG Replace compressor lock sensor. 3 Check for open and short harness and connector between A/C amplifier and room temperature sensor (See page IN–30). OK NG Repair or replace harness or connector. Proceed to next circuit inspection shown on matrix chart (See page AC–26). However, if the light is still blinking, check and replace A/C amplifier.